Bridge_Inspection_Rpt_STR_5140-155P.pdf

TUNNEL INSPECTION REPORT

BUNCHES BALD TUNNEL

BLUE RIDGE PARKWAY THROUGH BUNCHES BALD MOUNTAIN

BLUE RIDGE PARKWAY

NP

STRUCTURE NO. 5140-155P

INSPECTION TYPE: ROUTINE

INSPECTION DATE: 6/16/15

Report prepared by: SP

MILE POINT: 459.29

Federal Highway Administration KILOMETER POINT: 739.14 Federal Lands Bridge Office Bridge Inspection and Management Program 21400 Ridgetop Circle Sterling, Virginia 20166 https://bridge.flhd.fhwa.dot.gov

STRUCTURE SUMMARY STRUCTURE NO. 5140-155P

BUNCHES BALD TUNNEL INSPECTION DATE: 6/16/15

TUNNEL IDENTIFICATION AND DESCRIPTION

LINING MATERIAL: ............... CONCRETE MINIMUM VERTICAL CLR: .... 12.6 FT (3.8 M)

SPRINGLINE LENGTH: ........ 29.4 FT (9.0 M) STRUCT. TOTAL LENGTH: ... 290.0 FT (88.4 M)

CURB TO CURB WIDTH: ..... 29.4 FT (9.0 M) YEAR BUILT:

PROJ./PLAN REF. NO: ......... 2Y2,2Z1,2Y7,2Y12 / 00000 YEAR RECONSTRUCTED:

NPS ROAD CLASS: .............. 1 - PRINCIPAL PARK ROAD

STRUCTURE HISTORY: ...... 2005-TUNNEL LINING AND DRAIN CHASES REPAIRED

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 459.29 (KM PT 739.14)

STATE: .................................. NORTH CAROLINA LOCATION: 3.6 MILES TO U.S. ROUTE 19

FACILITY CARRIED: ............. BLUE RIDGE PARKWAY

FEATURE INTERSECTED: ... BUNCHES BALD MOUNTAIN

STRUCTURE EVALUATION SUMMARY

This concrete lined tunnel is in fair condition overall. The main problem is the spalling with exposed drain chase at approximately 145' from the north portal, resulting in significant leakage. Also, there is leakage at both portals which is leaking onto the roadway, thus the roadway is damp throughout the tunnel, which could cause ice to form when the temperature drops below freezing, causing hazardous driving conditions. Additionally, there is minor debris accumulation along the base of the west liner.

Other problems include vegetation growth from the portal mortar joints, up to 18" deep voids in mortar joint between the masonry ring stones and the tunnel lining at the southwest corner, and minor spalling with exposed rebar on the east lining. Finally, the clearance signs at both approaches do not reflect the actual vertical clearance and the tunnel sign is missing from the south approach.

Corrective action should be taken as outlined in this report to prevent the possible development of more serious or costly problems in the future.

INSPECTION TEAM: C. CASTRO, R. SILVESTRY

CONDITION ASSESSMENT:

CARLOS CASTRO, P.E., FIELD TEAM LEADER 571-434-1546

REPORT REVIEW:

MARCUS MILLER, P.E., SENIOR INSPECTION ENGINEER 703-404-6252

REPORT APPROVAL: DATE: 12/31/15

JORGOMAI CEESAY, PH.D., P.E., BIP SUPERVISORY ENGINEER 703-404-6244

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 5140-155P

A (Critical) - Structure is closed, in imminent danger of collapse, or presents a critical safety hazard.

B (Major) - Structure is seriously deficient or presents a safety hazard, but can remain in service at reduced loads or with frequent inspections.

C (Moderate) - Structure is deficient, functionally obsolete, or requires substantial repairs to prevent a serious deficiency or unsafe condition.

D (Minor) - Structure is generally in good condition. Preventative maintenance may be required.

E (Special) - Structure is under construction or reconstruction.

C226 PRIORITY OF IMPROVEMENT

ITEM

NO.

MAINTENANCE RECOMMENDATIONS

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT COST

UNIT

ESTIMATE

COST

PRELIM.

59.2,4 REMOVE VEGETATION FROM PORTAL MORTAR JOINTS. REMOVE ACCUMULATED

DEBRIS ALONG BASE OF WEST LINING.

1 LS $3,000 $3,000

59.2 REPOINT MORTAR AT SOUTHWEST CORNER OF TUNNEL AT JOINT BETWEEN

LINING AND MASONRY RING STONES.

1 LS $2,000 $2,000

59.1 CLEAN AND SEAL EXPOSED REBAR ON EAST LINING WITH APPROVED

PROTECTIVE COATING.

1 SF $250 $1,000

222.7 INSTALL CORRECT MINIMUM VERTICAL CLEARANCE SIGNS AT APPROACHES.

PROVIDE TUNNEL SIGN AT SOUTH APPROACH.

3 EA $250 $1,000

PRELIM. MAINTENANCE TOTAL : $7,000

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS) QTY. UNIT UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

59.4 REPAIR DRAIN CHASE APPROXIMATELY 145' FROM NORTH PORTAL. 45 LF $750 $35,000 $0

59 CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN/CONSTRUCTION ENGINEERING.

1 LS $25,000 $25,000 $0

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL : $60,000 $0

COST ESTIMATE SUMMARY

PRELIM. MAINTENANCE TOTAL:

PRELIM. REHABILITATION TOTAL:

PRELIM. RECONSTRUCTION TOTAL: ...

TOTAL ITEMIZED COSTS:

$0 $60,000 $7,000

$67,000

PRELIMINARY ESTIMATE TOTAL* :

(*Includes typical contract costs for mobilization, traffic control, and design/construction engineering; but does not include detour bridges, work beyond the bridge limits, or work not listed above. Estimates are approximate and are for preliminary planning purposes only; they should not be used as a complete or final engineers estimate.)

$67,000

REMARKS: Cost estimates assume that the recommended actions will be combined with similar work being performed on other structures.

FIELD INSPECTION REPORT STRUCTURE NO. 5140-155P

CONDITION RATING CODES FOR ITEMS 58 - 62, 222, 223

N

NOT APPLICABLE

EXCELLENT CONDITION

VERY GOOD CONDITION - no problems noted.

GOOD CONDITION - some minor problems.

SATISFACTORY CONDITION - structural elements show some minor deterioration.

FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling, or scour.

POOR CONDITION - advanced section loss, deterioration, spalling, or scour.

SERIOUS CONDITION - loss of section, deterioration, spalling, or scour have seriously affected primary structural components. Local failures are possible.

Fatigue cracks in steel or shear cracks in concrete may be present.

CRITICAL CONDITION - advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the structure until corrective action can be taken.

“IMMINENT” FAILURE CONDITION - major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Structure is closed to traffic but corrective action may return structure to light service.

FAILED CONDITION - out of service; beyond corrective action.

CONDITION RATING CODE EQUIVALENTS FOR SUB-ELEMENTS

G = GOOD (CODES 7 - 9) F = FAIR (CODES 5 - 6) P = POOR (CODES 0 - 4)

59. TUNNEL 6

F

2. PORTALS

1. LINING

F

N3. CURBS AND SIDEWALKS

F4. DRAINS AND DRAINAGE

G5. WEARING SURFACE

G6. RIDEABILITY

N7. LIGHTING

G8. OTHER (REFLECTORS)

9. ADEQUACY OF OPENING INSUFF

222. APPROACHES 7

N1. APPROACH SLABS

N2. RELIEF JOINTS

N3. APPROACH GUARDRAIL

G4. SURFACING

G5. EROSION

G6. SETTLEMENT

F7. SIGNS

G8. ALIGNMENT

N9. OTHER

223. RETAINING WALL N

1. WALL

2. WEEP HOLES

3. FOUNDATION

4. EROSION AND/OR SCOUR

5. SETTLEMENT OR DEFLECTION

6. OTHER

36. TRAFFIC AND SAFETY FEATURES

NA. BRIDGE RAILINGS

NB. TRANSITIONS

NC. APPROACH GUARDRAILS

ND. APPROACH GUARDRAIL ENDS

TRAFFIC SAFETY RATING CODES

0 - Does not meet standards or a safety feature is required and none is provided.

1 - Meets currently acceptable standards.

N - Not applicable or a safety feature is not required.

ITEM REFERENCE AND REMARKS

59.1,4 MINOR SPALLS THROUGHOUT; MINOR SPALLING WITH EXPOSED

REBAR ON EAST LINING APPROXIMATELY 178' FROM NORTH

PORTAL. ISOLATED HOLLOW SOUNDING AREAS AT JOINTS ALONG

WEST LINER.

MINOR CRACKING WITH EFFLORESCENCE AND LEAKAGE

THROUGHOUT TUNNEL, ESPECIALLY ALONG DRAIN CHASES.

SEALED CRACKS WITH EFFLORESCENCE ON WEST LINING NEAR

PORTAL; ON BOTH SIDES OF LINING APPROXIMATELY 230' FROM

NORTH PORTAL; ON EAST LINING NEAR SOUTH PORTAL.

MODERATE SPALLING WITH EXPOSED DRAIN CHASE ON EAST

LINING APPROXIMATELY 145' FROM NORTH PORTAL; HOLES HAVE

DEVELOPED IN DRAIN CHASE RESULTING IN SIGNIFICANT

LEAKAGE.

59.2 MODERATE TO SEVERE DETERIORATION WITH LEAKAGE OF

MORTAR JOINT AT SOUTHWEST CORNER BETWEEN MASONRY RING

STONES AND TUNNEL LINING, VOIDS UP TO 18" DEEP PRESENT.

MINOR DETERIORATION OF MORTAR JOINTS WITH

EFFLORESCENCE AND MINOR VEGETATION GROWING FROM

NORTH PORTAL MORTAR JOINTS; MODERATE AT SOUTH PORTAL.

MINOR LEAKAGE AND EFFLORESCENCE ON RING STONES.

59.4,5 WATER LEAKING ONTO ROADWAY AT BOTH PORTALS; ROADWAY

DAMP THROUGHOUT TUNNEL.

MINOR DEBRIS ACCUMULATION ALONG WEST LINER.

222.7 VERTICAL CLEARANCE SIGNS ARE AT BOTH APPROACHES; 11'-5" AT

SOUTH APPROACH; 13'-8" AT NORTH APPROACH; ACTUAL VERTICAL

CLEARANCE IS 12'-8". TUNNEL SIGN MISSING AT SOUTH APPROACH.

"TURN LIGHTS ON" AND "ICE ON PAVEMENT" SIGNS AT BOTH

APPROACHES. "BUNCHES BALD OVERLOOK" SIGN AT NORTH

APPROACH.

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-155P

STRUCTURE IDENTIFICATION

(201) PARK: BLUE RIDGE PARKWAY (1) STATE: ....................................... 374 - NORTH CAROLINA (NC)

(202) STRUCTURE NAME: .......... BUNCHES BALD TUNNEL (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............3 - TUNNEL (3) COUNTY CODE: ........................ 087 - HAYWOOD

(204) STRUCTURE NUMBER: ..... 5140-155P (4) CITY/PLACE CODE:

(205) NPS REGION: .................... 4 - SOUTHEAST (5) INVENTORY ROUTE:

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... BUNCHES BALD MOUNTAIN

(207) ROAD SECTION NO: .......... 155P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140155P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 3.6 MILES TO U.S. ROUTE 1

(210) OPERATING UNIT: ............. BALSAM (10) INV. RTE. - MIN. VERT. CLR: .. 12.80 FT (3.90 M)

(211) PROJECT NO(S): ................ 2Y2,2Z1,2Y7,2Y12 (11) MILE POINT: ............................. 459.29 (KM PT 739.14)

(212) DRAWING NUMBERS: ....... 00000 (27) YEAR BUILT:

(21) MAINTAINED BY: ................. 66 - NATIONAL PARK SERVICE (106) YEAR RECONSTRUCTED:

(22) OWNER: ............................... 66 - NATIONAL PARK SERVICE (20) TOLL: ........................................ 3 - FREE ROAD

(37) HISTORICAL DESIGNATION: .. 5 - NOT ELIGIBLE

STRUCTURE DESCRIPTION, FOUNDATION, AND DECK TYPE

(43A) MAIN STR. MATERIAL: ..

(43B) MAIN STR. TYPE:

(45) NO. OF MAIN SPANS:

(48) MAX. SPAN LENGTH:

(49) STRUCTURE LENGTH:

(216A) ABUTMENT #1 FDN:

(216B) ABUTMENT #2 FDN:

(217A) PREDOM. PIER FDN.: ..

(217B) SECOND. PIER FDN: ...

(107) DECK TYPE:

1 - CONCRETE

18 - TUNNEL

29.4 FT (9.0 M)

290.0 FT (88.4 M)

6 - N/A

6 - N/A

6 - N/A

6 - N/A

N - NOT APPLICABLE

(44A) APPR. STR. MATERIAL: ........ 0 - OTHER

(44B) APPR. STR. TYPE: ................ 00 - OTHER

(46) NO. OF APPROACH SPANS: .. 0

(108) WEAR SURFACE/PROTECT SYSTEM:

A) TYPE WEARING SURFACE: .. 6 - BITUMINOUS

B) TYPE MEMBRANE: ................. 0 - NONE

C) TYPE PROTECTION: .............. 0 - NONE

(218) IS SALT USED?: ..................... YES

LOAD RATING AND POSTING

(31) DESIGN LOAD: ................. 0 - UNKNOWN (41) LOAD RESTRICTION: ......... R - POSTED (OTHER)

(66) INVENTORY RATING: ...... 0.0 TONS (0.0 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 0.0 TONS (0.0 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 6/15 (91) FREQ. OF INSP: 24 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

(219) ADD. STUDIES NEEDED: N - 0 - NONE (A) FRACTURE CRITICAL: ... NO

INSP. EVERY: MONTHS - LAST INSP. : (220) SPECIAL STUDY TYPE: 0 - NONE

(B) UNDERWATER: .............. NO

(221) SPECIAL STUDY DATE: INSP. EVERY: MONTHS - LAST INSP. :

(C) SPECIAL INSPECTION: .. NO

INSP. EVERY: MONTHS - LAST INSP. :

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140-155P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(51) CURB TO CURB WIDTH: ........... 29.4 FT (9.0 M) (16) LATITUDE: ............................. 35°30'49.70"

(17) LONGITUDE: ......................... 83°11'34.00"

(19) DETOUR LENGTH: ............... 20 MI (32 KM)

(28A) LANES ON STRUCT:

(28B) LANES UNDER STRUCT: ... 02

(42A) SERVICE ON: ..................... 1 - HIGHWAY

(42B) SERVICE UNDER: .............. 1 - HIGHWAY

(29) AVG. DAILY TRAFFIC:

(30) YEAR OF ADT:

(114) FUTURE ADT:

(115) YEAR OF FUTURE ADT:

(101) PARALLEL STRUCTURE: ... N - NONE

(38) NAVIGATION CONTROL?: ... 0

(39) VERTICAL CLEARANCE: ...... 0.0 FT (0.0 M)

(40) HORIZ. CLEARANCE: ........... 0.0 FT (0.0 M)

(111) ABUT. OR PIER PROT:

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 0.0 FT (0.0 M)

(56) LEFT: ......................... 0.0 FT (0.0 M)

CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST

(58) DECK: ................................. N

(59) SUPERSTRUCTURE: .........N

(60) SUBSTRUCTURE: ..............N

(61) CHANNEL: .......................... N

(62) CULVERT: ........................... N

(222) APPROACHES:

(223) RETAINING WALL: ........... N

(36) TRAFFIC SAFETY FEAT: ... NNNN

(75A) TYPE OF WORK:

(75B) WORK DONE BY:

(76) IMPROVEMENT LENGTH: ..

(52) DECK WIDTH:

(32) APPR. ROADWAY WIDTH:

(213) APPR. PAVEMENT WIDTH:

LEFT SHOULDER:

RIGHT SHOULDER:

(33) BRIDGE MEDIAN:

(34) SKEW ANGLE:

(35) DECK FLARE?:

(47) TOTAL HORIZ. CLEARANCE:

(50) SIDEWALKS:

LEFT :

RIGHT :

(214) BRIDGE RAIL TYPE:

RAIL CONFIGURATION:

MATERIAL:

DESIGN TYPE:

(215) BRIDGE RAIL HEIGHT:

(53) MIN. VRT. CLEAR. OVER DECK:

(54) MIN. VRT. UNDERCLEARANCE:

0.0 FT (0.0 M)

38.0 FT (11.6 M)

22.0 FT (6.7 M)

8.0 FT (2.4 M)

8.0 FT (2.4 M)

0 - NO MEDIAN

0 °

NO

21.5 FT (6.6 M)

0.0 FT (0.0 M)

0.0 FT (0.0 M)

0 - N/A

0 - N/A

0 - N/A

0.00 FT (0.00 M)

12.58 FT (3.83 M)

12.58 FT (3.83 M)

(67) STRUCTURAL EVALUATION:

(68) DECK GEOMETRY:

(69) UNDERCLEARANCES:

(71) WATERWAY ADEQUACY:

(72) APPROACH ALIGNMENT:

(113) SCOUR CRITICAL:

(225) PURPOSE OF IMPROVEMENT:

(226) PRIORITY OF IMPROVEMENT:

(227) MAINTENANCE COST:

(228) REHAB./RECONSTR. COST: ...

(229) CONSTRUCTION COST:

N

N

N

N - Not over waterway.

2 - REHAB/RECONSTRUCTION

C - MODERATE

$7,000

$60,000

$0

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

2005-TUNNEL LINING AND DRAIN CHASES REPAIRED

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

APPENDIX STRUCTURE NO. 5140-155P

PHOTOGRAPHS STRUCTURE NO. 5140-155P

PHOTO #1 - NORTH PORTAL

PHOTO #2 - SOUTH PORTAL

PHOTO #3 - GENERAL UNDERSIDE VIEW LOOKING SOUTH

PHOTO #4 - GENERAL ROADWAY VIEW LOOKING SOUTH

PHOTO #5 - LEAKAGE AT WEST SIDE OF

NORTH PORTAL; ALSO NOTE TYPICAL DEBRIS

AND SOIL ACCUMULATION ALONG WEST WALL

PHOTO #6 - GENERAL VIEW OF WEST LINING

LOOKING SOUTH FROM NORTH END; NOTE

WATER LEAKAGE AND EFFLORESCENCE

FROM DRAIN CHASES

PHOTO #7 - PREVIOUSLY REPAIRED VOID REOPENED IN WEST LINING

AT 40' FROM NORTH PORTAL

PHOTO #8 - ACTIVE WATER LEAKAGE THROUGH SEALED CRACKS

ALONG DRAIN CHASE ON WEST SIDE APPROXIMATELY 65' FROM

NORTH PORTAL

PHOTO #9 - ACTIVE WATER LEAKAGE ALONG

PREVIOUSLY SEALED CRACKS ON EAST

LINING APPROXIMATELY 88' FROM NORTH

PORTAL

PHOTO #10 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE ALONG DRAIN CHASE ON WEST

LINING APPROXIMATELY 100' FROM NORTH

PORTAL

PHOTO #11 - CRACKING WITH

EFFLORESCENCE AT CROWN APPROXIMATELY

107' FROM NORTH PORTAL

PHOTO #12 - CRACKING WITH

EFFLORESCENCE AND ACTIVE WATER

LEAKAGE ON WEST LINING APPROXIMATELY

107' FROM NORTH PORTAL

PHOTO #13 - SEALED CRACKING AND

EFFLORESCENCE ON WEST LINING

APPROXIMATELY 140' FROM NORTH PORTAL;

NOTE DAMPNESS

PHOTO #14 - SPALLING WITH EXPOSED DRAIN

CHASE ON EAST LINING APPROXIMATELY 145'

FROM NORTH PORTAL; NOTE HOLE IN DRAIN

CHASE

PHOTO #15 - SPALLING ON EAST LINING AND

CRACKING WITH ACTIVE WATER LEAKAGE

APPROXIMATELY 160' FROM NORTH PORTAL

PHOTO #16 - SPALLING WITH EXPOSED

REBAR ON EAST LINING APPROXIMATELY 178'

FROM NORTH PORTAL

PHOTO #17 - ACTIVE LEAKAGE THROUGH

DRAIN CHASE APPROXIMATELY 180' FROM

NORTH PORTAL ON WEST SIDE

PHOTO #18 - EFFLORESCENCE AT SEALED

CRACKS 230' FROM NORTH PORTAL; NOTE

ACTIVE LEAKAGE

PHOTO #19 - SEALED CRACKS AND EFFLORESCENCE ON WEST LINING

NEAR SOUTH PORTAL; NOTE ACTIVE LEAKAGE ALONG RIGHT DRAIN

CHASE

PHOTO #20 - SEALED CRACKS ON EAST LINING NEAR SOUTH PORTAL;

NOTE ACTIVE LEAKAGE ALONG CRACK ON LEFT SIDE

PHOTO #21 - TYPICAL DEBRIS ACCUMULATION ALONG WEST WALL

PHOTO #22 - CRACKING WITH EFFLORESCENCE AT SOUTH END OF

WEST WALL

PHOTO #23 - BROKEN MORTAR JOINT

BETWEEN WEST WALL AND SOUTH PORTAL,

NOTE UP TO 18' DEPTH VOIDS

PHOTO #24 - TYPICAL MOSS AND VEGETATION

GROWTH ON PORTALS, WEST SIDE OF SOUTH

PORTAL SHOWN